js画矩形
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="main" style="position:relative"></div>
<script>
function Rect(options) {
this._init(options);
}
Rect.prototype={
//属性
_init:function (options) {
//父标签
this.parentId=options.parentId;
//位置
this.left=options.left||100;
this.top=options.top||100;
//自身的属性
this.width=options.width||100;
this.height=options.height||50;
this.bgColor=options.bgColor||'#000';
this.borderRadius=options.borderRadius||0;
this.border=options.border||'none';
},
//行为
render:function () {
//1.获取父标签
var parentEle=document.getElementById(this.parentId);
//2.创建矩形标签
var reactEle=document.createElement('div');
parentEle.appendChild(reactEle);
reactEle.style.position='absolute';
reactEle.style.left=this.left+'px';
reactEle.style.top=this.top+'px';
reactEle.style.width=this.width+'px';
reactEle.style.height=this.height+'px';
reactEle.style.backgroundColor=this.bgColor;
reactEle.style.border=this.border;
reactEle.style.borderRadius=this.borderRadius+'px';
}
}
//创建矩形对象
var rect=new Rect({
parentId:'main',
left:200,
top:200,
width:500,
height:300,
bgColor:'pink',
borderRadius:20,
border:'10px solid #000'
});
rect.render();
</script>
</body>
</html>
面向对象js计算功能
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script type="text/html"></script>
<script>
var Caculator={
result:0,
jia:function (num) {
this.result+=num;
return this;
},
jian:function (num) {
this.result-=num;
return this;
},
cheng:function(num){
this.result*=num;
return this;
},
chu:function (num) {
this.result/=num;
return this;
},
log:function () {
console.log(this.result);
return this;
},
clean:function () {
this.result=0;
return this;
}
};
Caculator.jia(6);
Caculator.jia(6);
Caculator.cheng(2);
Caculator.chu(3);
Caculator.jian(4);
console.jia(6).jia(6).cheng(2).chu(3).jian(4).log();
</script>
</body>
</html>
面向对象方法分装tab选项卡
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>选项卡</title>
<link rel="stylesheet" href="css/index.css">
</head>
<body>
<div id="tab">
<!--头部-->
<div id="tab_header">
<ul>
<li class="selected">公告</li>
<li>规则</li>
<li>论坛</li>
<li>安全</li>
<li>公益</li>
</ul>
</div>
<!--主要内容-->
<div id="tab_content">
<div class="dom" style="display: block">
<ul>
<li><a href="#">数据七夕:金牛爱送玫瑰</a></li>
<li><a href="#"> 阿里打造"互联网监管"</a></li>
<li><a href="#">10万家店60万新品</a></li>
<li><a href="#">全球最大网上时装周</a></li>
</ul>
</div>
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<ul>
<li>
<a href="#">“全额返现”要管控啦</a>
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<li>
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<li>
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</li>
<li>
<a href="#">质量相关规则近期变更</a>
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</ul>
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<ul>
<li>
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<li>
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<li>
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<li>
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</li>
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</div>
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<ul>
<li>
<a href="#">接次文件，毁了一家店</a>
</li>
<li>
<a href="#">账号安全神器阿里钱盾</a>
</li>
<li>
<a href="#">新版阿里110上线了</a>
</li>
<li>
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</li>
</ul>
</div>
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<ul>
<li>
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</li>
<li>
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</li>
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</div>
<script src="s/Tab.js"></script>
<script src="s/index.js"></script>
</body>
</html>
*{
margin: 0;
padding: 0;
list-style: none;
box-sizing: border-box;
}
a{
text-decoration: none;
color: #000;
}
#tab{
width: 500px;
height: 120px;
border: 1px solid #ccc;
margin: 100px auto;
}
/*选项卡--头部*/
#tab_header{
height: 29px;
line-height: 28px;
/*background-color: red;*/
overflow: hidden;
}
#tab_header ul{
width: 500px;
display: flex;
justify-content: space-around;
align-items: center;
}
#tab_header ul li{
flex: 1;
text-align: center;
background-color: #e8e8e8;
border-bottom: 1px solid #cccccc;
}
#tab_header ul li.selected{
background-color: #ffffff;
border-bottom: none;
/*左右线条*/
border-left: 1px solid #cccccc;
border-right: 1px solid #cccccc;
}
#tab_header ul li:nth-child(1){
border-left: none;
}
#tab_header ul li:nth-last-child{
border-right: none;
}
#tab_header ul li:hover{
cursor: pointer;
font-weight: bolder;
color: orangered;
}
/*选项卡--头部*/
/*选项卡--主要内容*/
#tab_content{
}
#tab_content .dom{
padding-top: 20px;
display: none;
}
#tab_content .dom ul li{
float: left;
width: 220px;
/*background-color: red;*/
text-align: center;
margin: 5px;
}
/*选项卡--主要内容*/
var tab = new TabsFn();
tab.init();
function $(id) {
return typeof id === 'string' ? document.getElementById(id) : null;
}
function TabsFn() {
// 属性
this.lis = $('tab_header').getElementsByTagName('li');
this.contents = $('tab_content').getElementsByClassName('dom');
}
TabsFn.prototype = {
init: function(){
// 1. 设置索引
this.setId();
// 2. 绑定事件
this.bindEvent();
},
// 设置索引(id)
setId: function () {
for(var i=0; i<this.lis.length; i++){
this.lis[i].id = i;
}
},
// 绑定事件
bindEvent: function () {
// 备份指针
var self = this;
for (var i = 0; i < this.lis.length; i++) {
this.lis[i].onmouseover = function () {
// 2.1 所有的都不被选中
for(var j=0; j<self.lis.length; j++){
self.lis[j].className = '';
self.contents[j].style.display = 'none';
}
// 2.2 当前的li被选中
this.className = 'selected';
self.contents[this.id].style.display = 'block';
}
}
}
};
绚丽五彩小球：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{
margin: 0;
padding:0;
list-style: none;
}
html,body,div{
width: 100%;
height:100%;
}
#box{
background-color: #000;
position: relative;
}
</style>
</head>
<body>
<div id="box">
</div>
<script src="五彩特效/js/Underscore-min.js"></script>
<script src="五彩特效/js/Ball.js"></script>
<script type="text/html">
//1.获取父标签
var box=document.getElementById('box');
var ball=new Ball({
parentId:'box',
left:100,
top:200,
bgColor:'green'
});
ball.render();
</script>
<script>
//1.获取需要的标签
var box=document.getElementById('box');
//2.监听鼠标在盒子上的移动
var colorArr=['red','green','blue','yellow','orange','purple','pink'];
var ballArr=[];
box.onmousemove=function (ev) {
//2.1创建小球
var ball=new Ball({
parentId:'box',
left:ev.clientX,
top:ev.clientY,
bgColor:colorArr[_.random(0,colorArr.length-1)]
});
//2.2创建的小球放入数组中
ballArr.push(ball);
};
//3.设置定时器
setInterval(function(){
//1.清除上一帧产生的小球
for(var i=0;i<box.children.length;i++){
box.children[i].remove();
}
//2.让小球移动变小
for(var j=0;j<ballArr.length;j++){
ballArr[j].render();
ballArr[j].update();
}
},50);
</script>
</body>
</html>
function Ball(options){
this._init(options);
}
Ball.prototype={
_init:function (options) {
//1.必要属性
this.parentId=options.parentId;
this.left=options.left;
this.top=options.top;
this.r=60;
this.bgColor=options.bgColor||'red';
//2.小球变化的量
this.dX=_.random(-5,5);
this.dY=_.random(-5,5);
this.dR=_.random(1,3);//半径
},
//行为
render:function () {
var parentNode=document.getElementById(this.parentId);
var childNode=document.createElement('div');
parentNode.appendChild(childNode);
childNode.style.position='absolute';
childNode.style.left=this.left+'px';
childNode.style.top=this.top+'px';
childNode.style.width=this.r+'px';
childNode.style.height=this.r+'px';
childNode.style.borderRadius='50%';
childNode.style.backgroundColor=this.bgColor;
},
update:function () {
this.left+=this.dX;
this.top+=this.dY;
this.r-=this.dR;
//判断
if(this.r<=0){
this.r=0;
//把小球移除
ballArr=_.without(ballArr,this);
}
}
};
